科学结构是构成科学体系的知识元素的相对稳定的联系方式。

The structural of science is the more steady contacted mode which are the element of knowledge to make of the scientific system.

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概念知识库包含两类知识元素：与专业领域相关的概念，概念之间的语义关系。

Conceptual knowledge base includes two categories of knowledge elements, i. e. subject-related concepts and semantic relations among concepts.

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GTVH属于语言学范畴的幽默理论，它提出了由六大知识元素构成的幽默机制，并指出六大元素中脚本对立或不一致元素最重要。

GTVH is a linguistic humor theory which proposes a humor mechanism consisting of six Knowledge Resources with Script Opposition or incongruity as its essential Knowledge Resource.

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So let's turn our attention to a new topic, which is thinking a little bit about the periodic table, and also talking about periodic trends.

我们的新主题上，我们将会讨论一点关于元素周期表的知识，同时也会讲一讲周期性规律。

麻省理工公开课 - 化学原理课程节选